4047499549 has 2 divisors, whose sum is σ = 4047499550. Its totient is φ = 4047499548.

The previous prime is 4047499537. The next prime is 4047499607. The reversal of 4047499549 is 9459947404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4044324025 + 3175524 = 63595^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 4047499549 - 2¹⁵ = 4047466781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4047499549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4047409549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2023749774 + 2023749775.

It is an arithmetic number, because the mean of its divisors is an integer number (2023749775).

Almost surely, 2^4047499549 is an apocalyptic number.

It is an amenable number.

4047499549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4047499549 is an equidigital number, since it uses as much as digits as its factorization.

4047499549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The square root of 4047499549 is about 63619.9618751851. The cubic root of 4047499549 is about 1593.6597460329.

It can be divided in two parts, 40474995 and 49, that added together give a square (40475044 = 6362²).

The spelling of 4047499549 in words is "four billion, forty-seven million, four hundred ninety-nine thousand, five hundred forty-nine".